The game threatened to boil over at that point and players were seen scuffling in the tunnel as they headed off at half-time.

Wigan's Tom Davies wins the race to George Williams' kick for Wigan's second try (Alex Whitehead/SWpix.com)

Warrington had opened the scoring with former Wigan winger Josh Charnley crossing in the 14th minute.

However, they would not score again and were left to rue a raft of handling mistakes - it was a scrappy final - that meant they wasted plenty of prime attacking positions.

Wolves full-back Stefan Ratchford was a threat, making a couple of breaks in the second period and winning the Harry Sunderland Award as man-of-the-match, but time after time his side lacked a finishing touch.

Favourites Wigan defended well but Warrington - who also lost the Challenge Cup final at Wembley and have not won the league since 1955 - will realise they did not ask enough questions.

Manfredi scored his first in the 26th minute after some quality play from Oliver Gildart, the young centre last week called up to the England squad.

Fellow winger Tom Davies then put Wigan ahead when he latched on to George Williams’ grubber in the 31st minute and it would prove enough, even with Tomkins missing all his conversion attempts and a penalty.

It is the third time Wigan have beaten Warrington in the Grand Final having also done so in 2013 and two years ago.